Gemstone



FIG. 1 is a top plan view of a gemstone showing my new design;

FIG. 2 is an end elevational view thereof, the opposite end view being a mirror image;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a gemstone, as shown and described. 